Dynabrade 90082 7-Inch Diameter Natural Sheepskin Wool Reattachable Hook-Face Backing Polishing Pad, White White Foam: Polishing - foam cells are smaller and closer together than Yellow Foam cells making the action less aggressive Natural Sheepskin: Final finishing and polishing; softer feel than synthetic wool Can be used with sanding cremes for metal, fiberglass and composites Glazes can be applied for high glass after compounding Industrial-rated for tough production performance